Oil burner



Sept. 8, 1925.

J. F. GUTHRxE:

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@w QN 0M, WPV E. N I m,

Patented Sept. 8, 1925.

TAKES I'. GUIHRIE, 0F NEWTON, MASSACHUSETTS. l

OIL BURNER.

Application mea october 20,'1a2s. semi No. 669,733.

To all 'whom it may concern:

Be it known that I, JAMES F. GUTHRIE, a citizen of the United States, residing in Newton, in the county of Middlesex and State of Massachusetts, have invented an Improvement in Oil Burners, of which the following descri tion, in connection with the accompanying rawings, isa specification, like characters on the drawings representing like parts.

This invention relates to a burner, and more particularly to an oil burner for furnaces, boilers and the like.

The invention has for its object to provide a novel and improved construction of burner of the character specified by which the oil or other liquid fuel is discharged from the burner in such intimate relation with steam as to obtain maximum efficiency in the operation of the burner and a minimum consumption of oil and minimum carbonization, and which inl addition affords improved regulation of the heat produced. The improved burner may be. economically manufactured and is adapted to operate for long periods of time without requiringattention. v

To these ends the burner comprises a casing having a steam inlet and an oil inlet, andv provision is made for causing the oil to be heated -by the steam and to be intimately mixed therewith within the burner. Provision is also preferably made for regulatin the consumption of the oil in a novel an improved manner as will be described.

These and other features of the invention will be hereinafter described and particularly pointed out in the claims at the end of this specification. y

In the drawin illustrating the preferred embodiment of tlie invention,

Fig. 1 is a vertical section of the improved burner;

Fig. 2 is a section on line 2-2 of Fig. 1; and

Fig. 3 is a section on line 3-3 of Fig. 1.

Referring to the drawings, the burner illustrated therein comprises a casing 10 having a steam inlet 12 and an oil inlet 13 into which the threaded end of pipes 14, 15, are screwed to sup-ply steam and 011 respectively to the burner. The casing 10 is provided with a removable head 20, preferably having a conica] Section provided with a discharge opening in which is fitted an outlet pipe 21, which is adapted to extend through the wall 22 of the furnace or boiler, and which is provided upon its end with a removable nozzle 24 having one or more ports 25 through which the mixture of oil and steam emerges to be lburned within the furnace or boiler.

The casing 10 is provided withan outer steam chamber 30, the inner wall of which is formed by a metal y cone 32 removably held 1n positlon by the removable 'head 20. The passage of steam' into the outer steam chamber is controlled by a plug valve 34 lo-l cated 1n a partition wall 35 within the casing 10 .and o rative from outside of the said casing. he outer end of the metal cone 32 is. rovided with one or more openings or ori ces, and preferably with a series thereof, which are arranged in two Sets, one set 39 being annularly disposed about the axis of the cone, and the second set 40 bei arranged angularly for a purpose as w11 be described.

During the o ration of the burner, steam emerges from t e steam chamber 30 through the openings 39, 40 into a mixing chamber 42 formed by the cone 32 and the head 20. The casing 10 of the burner is also provided'with a second steam chamber within the outer steam chamber 30, and which is herein shown as formed by a pipe 50 threaded into the internal partition wall 35, and into which the flow of steam is regulated by a valve 54.

The valve 54 preferably com rises the end portion of a valve stem or r 55, said end portion having a longitudinally extended recess 56, preferably V-Shaped and tapered outwardly in the manner illustrated in Figs.

1 and 2.

The vV-shaped recess 56 co-operates with the bore of the steam pipe 50 to effectively control the admission of steam from the steam inlet 12 into the steam pipe 50. The4 valve stem 55 is providedwith screw-threads 60 which engage a threaded bore in a stuffing box -62 of usual construction; The valve stem. 55 may and preferably will be provided with the usual hand wheel 66. The steam 'flowing through the steam pipe 50, which comprises a second or inner steam chamber, emerges therefrom, preferably through a series of orices in a nozzle 72, which is herein shown as screwed upon the threaded end of the steam pipe, and therefore can be readil removed therefrom. The oil supplied throng the oil inlet 13 is discharged into the mixherein shown as comprising an annular pasing chamber 42 through an oil passage 75,

sage formed 'by the innerwall 32 of"the outer steam chamber anda conical valve or member 76 screwed upon the steam plpe 50, as illustrated in Fig. 1 and capablefof l steam jets which issue-from the adjustment toward and away from the inner wall 32 to thereby regulate the quantity of oil fed to the mixing chamber 42. The annular oil passage thus formed is prefer-v ably of a tapering form, and the walls thereof may be of different tapers. The conical valve or member 76 may be adjustedso as to cause t-he oil to be supplied to the mixing chamber in a thin film, which 1s readily broken up or atomized by the steam.

From the above description, it will be seen, that the oil on vits passa to the mlxlng chamber is rendered fluent by the heat from the outer and inner steam lchambers 3 0', 50, and is thus placed in av condition 1n which it may be quickly and easlly atomized or broken upinto minute particles by the erts 39, 40, which are arrangedv to project t e steam in two directions at an angle to each other. The steam ports 39 are annular;

ranged about the outlet mouth ofv oil 'A supply passage 75 and the steam from these ports meets the oil and projects it against the conical wall of the -mixing chamber 4 2, by which the mixture of oil and steam 1s directed to the outlet pipe 21.

The steam ports 40 are arranged at an i angle to the outlet mouth of the oil passage they steam issuing from the. f 'thereby assist inthe atomlzlng of the"o1l. A

` The flaring end portion also acts as a" 4 75 y and so 'as to project the steam issuin 3 Afrom them across the oil issuin from the oi assage, and toward the nozzle 2, and thereb act to atomize the oil.v f

The nozzle 72 is preferably provided with an' outwardly curvedor flaring end portitmV 80, which co-operates with the steam ports 40 so as to be struck by the oil projected by ports 40, and

deflector'to lcause the current of steam-and oil created by the steam issuing` from .the vports 40, to be directed a ainst the conical end wall of the mixing c amber 42, where' r said current meets the currentI of oil *andy steam vcreated by the steamissuing from the ports 39.

In this manner, the oil and'steam is Jeiiiciently mixed within themxing chamber b the; steam issui l mixed-bythe steam from the inner Steam position. f1.7@

chamber 50, which is projected through the f i. Ports 70,111"v the steam-nozzle 72, and Which meets 'thel mixture of oil and 'steamas it e nozzle 72 acts as a nut with res ct to "the valve 7 6 'to-keep the-latter its justed 4said 'conical oil p from the outside' steam c vailiber 30', f' and t islmixture is "further e 'flhe'oil consumption may be in asimple and economicmanner b removing the head 20 from the end of the urner casing and, adjusting theH vvalve 76 upon ythe steam ipe 50, so as to more or less close or o en t e annular oil passage 75, through w ich the oil passes into the mixing chamber. After an adjustment ofthe valve 76 has been made, the head 20 may bere laced and the burner installed, and the o consumption of the burner remains constant, free from being tampered with, thus insuring that the burner operates in accordance with a predetermined adjustment.

The thoroughness with which the oil .is atomized or mixed in intimate association with the steam insures a thorough combustion Within the fire box, resulting in in creased efficiency of the fire and avoiding to a large extent the formationof carbon or soot.

The oil consumption of the burner ma be cut down' to a mnimu the annular oil passage controlling the oi supply within the burner/casing offering a w1 e range' of adjustments. This results in an improved regulation of the ire and a general increase in the eiiciency of the burner over existing tyPes. A f i While the referred embodiment of the invention Ahas n illustrated and described, .it is not desiredto limit the invention to' the particular construction shown.

' Having'thus described the invention, what isclaimed is:

1. A burner comprising a steam inlet, an oil inlet and a 'schargel `opening, a' chamber formed within with its 'larger diameter toward the dis-v charge' opening and 'provided with a steam outlet passage at its larger lend, a cone fwithin saidconical inner wall with its larger diameter toward said discharge opening and Yforming with the conical inner wall a conical oilA passage communicating with the oil inlet 4at its' smaller diameter and .with said discharge'opening at its larger diameter, the steam outlet passage for said steam chamber beingarranged at an angle to the axis ofto discharge steam the casing and having a conical inner wall 'gainstthe stream of oil issuing v)from said o1lj passage.

2. A burner comprising a casing provided witha steam inlet and a steam outlet, two

steaml chamberswithin the casing arranged one within the otherin `fixed relation to said:

casing;each having a valve within the casing for controlling the lo'w of steam therethrough and being provided with discharge oriiicesspaced apart and arranged-to dls charge two separate bodies of steam into:

said casing, and a conical valve interposed between said steam chambers to form with the outer steam chamber a conical oil Vpasl sage and adjustable on the inner steam chamber to vary the size of said oil passage.

3. A burner comprising a casing provided with a steam inlet, an oil inlet and a discharge opening, an outer steam chamber having a conical inner Wall with its larger diameter toward the dischargeopening of said casing, an inner steam chamber extended axially of s aid outer steam chamber, said steam chambers having steam outlet ports arranged to discharge toward the discharge opening of said casing, and a conical valve mounted on said inner steam chamber with its larger diameter toward said discharge opening and (zo-operating with the conical wall of saidouter steam chamber to form a conical oil passage having its larger diameter toward the discharge opening of said casing.

4. A burner comprising a casing provided with a steam inlet and an oil inlet and .With a removable head having a discharge opening, a partition Wall Within said casing, a conical Wall cooperating with said partition Wall and said casing to form an outer steam chamber and cooperating with said removable head to form a mixing chamber Within said casing, a pipe carried by said partition Wall and forming an inner steam chamber discharging into said mixing chamber, a cone on said pipe cooperating with the conical Wall of said outer steam chamber to form an oil passage discharging into said mixing chamber, said conical Wall having a plurality of sets of orifices discharging into said mixing chamber in different directions.

5. A burner comprising a casing provided with a steam inlet and an oil inlet and with a removable head having a conical section provided with a discharge opening and forming within the casing a mixing chamber, a partition Wall Within said casing, a conical Wall co-operating with said partition Wall and said casing to form an outer steam chamber, a pipe carried by said partition Wall and forming an inner steam cham ber, and a conical valve on said pipe cooperating with the conical wall of the outer steam chamber to form an oil passage communicating with the mixing chamber Within said casing.

6. A burner comprising a casing having a steam inlet, an oil inlet and a discharge opening, a steam inlet pipe axially arranged within said casing` and provided at its outlet end with a nozzle. a valve Within the casing co-operating with the opposite end of the steam inlet pipe to control the supply of steam thereto, an outer steam chamber Within the casing provided with a conical inner wall surrounding the said steam inlet pipe and having a steam outlet arranged toproject steam against said nozzle, and a conical valve mounted on said steam inlet pipe to move longitudinally thereon and cooperating With the conical inner Wall of said outer steam chamber to form a conical oil passage between said outer steam chamber and said steam inlet pipe.

7. A burner comprising a casing provided with a steam inlet and an oil inlet and with a removable head having a conical section provided with a discharge opening, a partition wall Within said casing, a conical Wall cooperating with said partition Wall and with said casing to form an outer steam chamber and cooperating with said removable head to be held thereby and form therewith a mixing chamber Within said casing, a pipe carried by said partition Wall and forming an inner steam chamber terminatin Within said mixing chamber, a cone on said pipe cooperating with said conical wall to form an oil passage discharging into said mixing chamber and adjustable on said pipe to form a valve to regulate the amount of oil discharged into said mixing chamber, a nozzle on the discharge end of said pipe to maintain the said valve in its adjusted posi tion, said conical Wall of said outer steam chamber having a set of orifices arranged to discharge steam against the conical section of the removable head of the casing' and having a second set of orifices arranged at an angle to the rst set to discharge steam against the nozzle of said steam pipe.

8. A burner comprising a casing provided with a steam inlet, an oil inlet and a discharge opening, an outer steam chamber Within the casing having a conical inner Wallarranged with its larger diameter to- Ward said discharge opening, means for forming an inner steam chamber, a removable head for said casing co-operating With said steam chambers to form a mixing chamber, and a conicalvalve co-operating with the conical Wall of the outer steam chamber to form an oil passage which discharges into said mixing chamber, said conical valve being movable on said inner steam chamber to vary the size of said oil passage.

In testimony whereof, I have signed my name to this specification.

JAMES F. GUTHRIE. 

